Hôtel de Massa
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The Hôtel de Massa is an 18th-century hôtel particulier, or large townhouse, at 38 rue du Faubourg Saint-Jacques in the 14th arrondissement of Paris, France. It was originally located on the avenue des Champs-Élysées and was moved in 1929 to its present location, in a park beside the gardens of the Paris Observatory. Classified as a historical monument, it has since been occupied by the Société des gens de lettres.